Tissue-adapted invasion strategies of the rice blast fungus Magnaporthe oryzae.

Détails

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Etat: Public
Version: Final published version
ID Serval
serval:BIB_A71D535F4810
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Tissue-adapted invasion strategies of the rice blast fungus Magnaporthe oryzae.
Périodique
Plant Cell
Auteur⸱e⸱s
Marcel S., Sawers R., Oakeley E., Angliker H., Paszkowski U.
ISSN
1532-298X[electronic], 1040-4651[linking]
Statut éditorial
Publié
Date de publication
2010
Peer-reviewed
Oui
Volume
22
Numéro
9
Pages
3177-3187
Langue
anglais
Résumé
Magnaporthe oryzae causes rice blast, the most serious foliar fungal disease of cultivated rice (Oryza sativa). During hemibiotrophic leaf infection, the pathogen simultaneously combines biotrophic and necrotrophic growth. Here, we provide cytological and molecular evidence that, in contrast to leaf tissue infection, the fungus adopts a uniquely biotrophic infection strategy in roots for a prolonged period and spreads without causing a loss of host cell viability. Consistent with a biotrophic lifestyle, intracellularly growing hyphae of M. oryzae are surrounded by a plant-derived membrane. Global, temporal gene expression analysis used to monitor rice responses to progressive root infection revealed a rapid but transient induction of basal defense-related gene transcripts, indicating perception of the pathogen by the rice root. Early defense gene induction was followed by suppression at the onset of intracellular fungal growth, consistent with the biotrophic nature of root invasion. By contrast, during foliar infection, the vast majority of these transcripts continued to accumulate or increased in abundance. Furthermore, induction of necrotrophy-associated genes during early tissue penetration, previously observed in infected leaves, was not seen in roots. Collectively, our results not only report a global characterization of transcriptional root responses to a biotrophic fungal pathogen but also provide initial evidence for tissue-adapted fungal infection strategies.
Mots-clé
Gene Expression Profiling, Gene Expression Regulation, Plant, Magnaporthe/pathogenicity, Oligonucleotide Array Sequence Analysis, Oryza sativa/genetics, Oryza sativa/microbiology, Plant Diseases/microbiology, Plant Leaves/genetics, Plant Leaves/microbiology, Plant Roots/genetics, Plant Roots/microbiology, RNA, Plant
Pubmed
Web of science
Open Access
Oui
Création de la notice
21/10/2010 9:46
Dernière modification de la notice
20/08/2019 16:11
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